Grinding apparatus



Nov. 18, 1930; c. c. GIBSON GRINDING APPARATUS Filed April 30, 1929 Patented Nov. 18 1 930 V UNITED STATES, V g

CARTER c. emsom or HAMBURG, IOWA, essrenonf'ro,,rrrnlrwo wnv ELECTRIC GRINDER-COMPANY, F HAMB RG, IOWA, ;A.CORPQBATIO1\T (Ill-IOWA GRINDING errsiz artis 1 Application filed April 30,

This invention relates to a hollow grinding'apparatus and more particularly to an attachment for use with grinding wheels for holding an element which is to be hollow ground against the peripheral edge of the wheel. I

An important object of the invention is to provide in apparatus of this character a structure such that the angle of the element 10 to be ground to the grinding wheel maybe very finely regulated. v

A further object of the invention is to provide in a device of this character a structure permitting blades of varying length to be ground whilesupporting the same at a predetermined angle to the periphery of the wheel. a r a A still further and more important object of the invention is to provide an apparatus particularly adapted for supporting .the knives of meat grinders while hollow grinding the same. i

These and other objects I attain by the construction shown in the accompanying drawings wherein for the purpose of illustration I have shown-a preferred embodie ment of my invention and wherein Figure 1 is aside elevation of grinding apparatus constructed in accordance with my invention, the dotted lines indicating the adjustment of the shaft during'the grinding operation;

Figure 2 is an end elevation of the grindin apparatus partially in section V a 3L3 of Fig-.

Figure 3 is a sectionon line 'ure 2;

Figure 4 is a sectionon line 44 of Figure 1. i

' Referring .now more particularly to the drawing, the numeral IOgenerally designates a suitably driven grinding wheel which may be of any desired material and 11- a support associated therewith. In the! present dis-" closure the grinding wheel is the motor driven motor which is not herein shown. In accordreceive a shaft 13, which parallels the axis wh'eeliLlO, "which i is the indicated as of 7 portable type'and the sup port llcomprising a casing surrounding the 192e. "s eria No. 359,389.-

ofgrinding wheel 10. To the *outer end of this shaft or that end adjacenttjhe grinding wheel, I secure anarm generally designated atjli, this arm being formed in two sections 15 and l-6, whichiarepivotally connected to ed: 'a-worm 19 for coaction with the gear 18.

' This shaft has at one end an operating head QO inthefform ofa knurled dise' where I by a it 'may be varied andr the efi ective length of the arm l4 thus controlledf The-outer end of the free 7 rotated" and,"the ,r'elativefl I position Of'the armsections 15 and 16 maybe or outer section16'has secured to'one side edge thereof an 'outstandingf extension 21 whichitapers and which towar d its outer end has a studdike'projection 22 upon which is mounted a thumb 'nut 23 1 and a washer 24."

The side edges 25 ,offlthe taper ng projection arefpreferablybeveledto form a spade edge, asindicated; This projection is adapted to extend into the centralsquared opjening 26 ,7 of the knife27 ofa meaegrinde gandie adapt ejd to extendfdfagonally thereacross with the with the corspade 'edges 25 inengagement ners thereof'. Byus'e of the thumb "nut the knife 27 can be veryfirmly forced down uponthe extension21 so thatthe bladeis locked in position upon thearn The position of the, extension '21 with relationto the arm will be largely determined by the position of the blade sections128 or' ent instance, as aligning with the diagonals of the opening and accordingly, when the extension 21 is engaged, as above described, the'blades aligned 'therewith will extend parallel-to the shaft-13 the grinding proper position for V and accordingly to the axis of grinding. V a v It will be obvious that by varying the effective length ofthe arm,;theangle of the-face of theblade to the periphery of the, wheel may be varied and it will also be obvious that the angular displacement of the sections of the'ar m 'will assist in providing this-angular variation.

I blade 27. In the presthese blade sections are shown Therefore, by adjusting Worm 19, the desired angle can be obtained when the blade can be brought into engagement Withthe edge of the rotating Wheel, shaft 18 shifted longitudinally Will cause the blade to travel longitudinally upon this edge ofirthe Wheel, and the grindingthusaccomplished While I have .in the present instance desig- V nated this specific support for use in maing a p 'ypetenement-wands to be hollowIground in-proper position for M engagement With the grinding wheel it will, of course, be, obvious that this supporting means Will be varied to enableusje ofthe apparatus in other hollow grinding 6 m: tions Where desired o It will also beob-vious that other changes are possible inthe construction hereinbefore;

set forth and'laccordingly do not limit my selftheretoencept as hereinafter. claimed. .o

1 m; 1 1.111 combination with a rotating. grind ng disc, a haf axi lly p ra e ng the-disc and c mounted; ion rotation and! longitudinal shifting an arm;;carrietl;.-by the shaft mid arm being formed intwo .sectiOns, one of Which-is provided zvvit'hn. worm gear and the other 1 o hic iS-P OV QQ lLWi'bh a worm: for? coaotion with the gear, thej outer end: of the -outer section ofthearmhavinga flat tapered x en on-P ov e w th a tud,-an a t b n tmou e pqn sa ist d, 1 Y Y a .2- In co nb' at o =lw rf ating g i d?" ingdisc, a shaft axiallyparallelingthe disc dm u ed ifon mtionandzx cngitndine a t q he geareth tou er nd f-t e shifting-an arm carried by the'sha ft, said arm being formed: in'tvvo sections, one off which is provided-with-awornigear and the. otherof which is providedgwith a orm for extension p i ed w t az tandrazthumb nut mounted. upon-"said; stud, the. sides of h t pered ex ens on bei g; or d w t outer sectionio flthe'farmihaving a fiat' tapered;

' ,spade edges.

. In testimony vvhereof I: hereunto afiix my signature. o t t i v Q CARTER G.,-. F .B ON. 

